Sunday, 15 February 2009

In regedit.exe search for HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96A-E325-11CE-BFC1-08002BE10318}

Expand the registry node. You should see entries labeled "0000", "0001", "0002", etc.

Double-click on each key entry and in the right side panel look for the subkey "DriverDesc". Verify that the "DriverDesc" reads "Primary IDE Channel" or "Secondary IDE Channel".

Check to see if the registry entry "ResetErrorCountersOnSuccess" is already present and set to 1 (ie. "0x00000001"). If it is set to 0, double-click on "RestErrorCounterOnSuccess" and change the value to 1, close regedit, reboot your system, and after reboot check to see if DMA mode has been enabled.

If "ResetErrorCountersOnSuccess" it is not present, then select the "Edit" menu, select "New" and click on "DWORD value".

Enter the name "ResetErrorCountersOnSuccess" and press enter.

Double-click on "ResetErrorCountersOnSuccess" and enter the value 1.

Close regedit and reboot the system. After reboot, check the value of "Current Transfer Mode" for the channel(s) updated.